May or may not be a clone of is_in:city=* (in some places the city in the address corresponds to the post office that serves the area rather than the actual city, if any, in which the building is located)! The name of the city as given in postal addresses of the building/area.

The ISO 3166-1 alpha-2 two letter country code in upper case. Example: "DE" for Germany, "FR" for France, "IT" for Italy. Caveat: The ISO 3166-1 code for Great Britain is "GB" and not "UK".. See also: is_in:country=*

Use this for a full-text, often multi-line, address if you find the structured address fields unsuitable for denoting the address of this particular location. Examples: "Fifth house on the left after the village oak, Smalltown, Smallcountry" or "1200 West Sunset Boulevard Suite 110A". Beware that these strings can hardly be parsed by software.

The door number (or name) of an apartment/flat/office/room. Could also be called differently in some countries (In Austria for example it is sometimes referred to as "Top"). If a room has more than one door, you can tag them separately. See also: room=*

The number, letter, or name of a single unit or flat that exists within a larger complex. While a big building could have only one entrance, sometimes the way inside divides into different units or staircases, where certain apartments/flats/offices can only be reached though a specific unit. Useful for apartment, suite, or office numbers. Information necessary for postmen, for example.

Proposed subkeys

This tags are not commonly used. Please have a look at the other discussed alternatives.